added classes for client and server state machine

- a client state machine consits out of a 'ClientState' (every state of the machine) and a 'ClientStateMachine' (every state, which consists out of states), the machine starts with the ClientAutomaton
- analog for server
- started to implement logic for the server, transition from 'Lobby' to 'GameState'

Projekte/mdga/model/src/main/java/pp.mdga/server/Lobby.java

@@ -0,0 +1,52 @@
+package pp.mdga.server;
+
+import pp.mdga.message.client.*;
+import pp.mdga.message.server.ServerMessage;
+import pp.mdga.message.server.UpdateReady;
+import pp.mdga.message.server.UpdateTSK;
+
+public class Lobby extends ServerState {
+    public Lobby(ServerState parent, ServerGameLogic logic) {
+        super(parent, logic);
+        logic.getGame().addObserver(this);
+    }
+
+    @Override
+    public void receivedDeselectTSK(DeselectTSK msg) {
+        broadcastUpdate(new UpdateTSK());
+    }
+
+    @Override
+    public void receivedNotReady(LobbyNotReady msg) {
+        broadcastUpdate(new UpdateReady());
+    }
+
+    @Override
+    public void receivedReady(LobbyReady msg) {
+        broadcastUpdate(new UpdateReady());
+    }
+
+    @Override
+    public void receivedSelectTSK(SelectTSK msg) {
+        broadcastUpdate(new UpdateTSK());
+    }
+
+    private void broadcastUpdate(ServerMessage updateMessage) {
+        for (var entry : logic.getGame().getPlayers().entrySet()) {
+            logic.send(entry.getValue(), updateMessage);
+        }
+    }
+
+    @Override
+    public void receivedStartGame(ClientStartGame msg) {
+        // todo: implement??
+    }
+
+    @Override
+    public void update() {
+        if (logic.getGame().getGameHasStarted()) {
+            parent.gotoState(new GameState(parent, logic));
+            logic.getGame().removeObserver(this);
+        }
+    }
+}